Gasoline metering mechanism for trucks provided with power takeoffs



July 30, 1940. w H D W 2,209,689

GASOLINE METERING MECHANISM FOR TRUCKS PROVIDED WITH POWER TAKE-OFFS Filed Dec. 19, 1939 2 Sheets-Sheet l nr lu.

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W. H. DEW 2.209,689 GASOLINE METERING MECHANISM FOR TRUCKS PROVIDED WITH POWER TAKE-OFFS July so, 1940.

2 Sheets-Sheet 2 Filed. Dec. 19, 1939 Lw'entor;

JLDow William 5,, ma gm/1w Patented July 30, 1940 UNITED STATES- GASOLINE METERING MEGHAJNISMI FOB. 'gggxs PROVIDED WITH POWER TAKE- William 11. Dew, Waltham, Mass.

Application December 19,

1030, Serlal No. 310,001

3 Claims; (01. 221-95) The present invention relates to means for metering gasoline used on an oil truck or similar vehicle provided with a power take-off, while said truck is at a standstill and not traveling over a 5 road. A

In order to maintain the roads already built and provide for new roads, most States have established a fund for this purpose by taxing the owners of all motor vehicles on every gallon purchased for use while the vehicles are traveling over the roads, while gasoline purchased for any other purpose is not taxable.- c e Some vehicles such as large oil trucks use great quantity of gasoline while operating a pump to fill or empty the oil tanks thereon, and as the trucks during these operations are at a standstill the gasoline used in his manner is non-taxable. The same is true of other types of trucks, as for instance, hoist body trucks.

mine accurately the quantity of gasoline used for any purpose while the trucks are not in motion on the road. 1 4

All gasoline purchased for use on a truck must be paid for in full but if the tax omcials can be shown by accurate meter reports the exact quantity of gasoline used for other purposes a rebate may be obtained on the tax already paid.

To this end the main object of the invention is to provide means operable by the usual powertake-off-lever for diverting the gasoline from the pump through a meter whenthe truck is at a standstill and cut out said meter when the truck is ready for movement over the road and the gasoline is being pumped directly to the vehicle motor. In other words, the meter is only in use when power is not being transmitted to the driving mechanism of the vehicle, there being no object in metering the gasoline usedwhen the vehicle driving mechanism is in operation as no rebate is obtainable on gasoline-used while the vehicle is being driven over the road.

- This object .is attained by the instrumentalities shown in the accompanying drawings. For the purpose of illustrating the invention,

. one preferred form thereof is illustrated in the drawings, this form having been found to give satisfactory and reliable results, although it is to be understood that the various instrumentalities. or which the invention consists can be'variouslf arranged and-organized, and the inventionis not limited to the precise arrangement and organization of these instrumentalities as herein shown and described except as required'by the scope 01 55 the appended claims.

As a consequence, it is highly desirable to deter- I a gasoline supply.

Of the drawings Figure lfrepresents, in diagram, a mechanism embodying the principles ,of the. present invention.

Figure 2 represents, in diagram, a modified iormof said mechanism, and Y 4 Figure 3 represents, in diagram, another modi-' fied form of said mechanism.

Similar characters indicate like parts throughout the several figures of the drawings.

In the drawings, id is a power take-oil lever of usual construction such as oil trucks and similar vehicles are equipped with, this lever being pivoted at H and having pivotally connected to its lower end, at i2, a rod or bar It by whicha clutch mechanism is actuated to connect the driving mechanism to the vehicle motor, or disconnec the motor from said driving mechanism.

As this clutch operating mechanism is of usual construction and forms no part of the present so invention, it is deemed unnecessary to illustrate the same. I i

Connected to the lower end of the lever it is a it asIshown in Fig. 102 the drawings.

This valve 85 has a passage It extending there-- through and iromone end of this passage is a pipe l1 connectedat its opposite end to a pump is, said pump having a pipe is leading thereto from The opposite end of the passage to has a pipe 2il'leading therefrom to ameter M which may be e I of any usual construction..

From the meter 21 extends another pipe 22 leading to a carburetor 23. I 35 g This carburetor has a pipe 26 extending there y from to the vehicle motor and also has another pipe 25 leading therefrom to the passage 26 in th'e' valve l5. 7 I

The' plunger M has a transverse opening 21. therein which is adapted to be brought into alinement with the passage 46 when the lever i0 is nioved in the direction of the: arrow-a on Fig. 1 of the drawings. p

As shown inthe drawings, the passage 16 is 45 closed and-the passage 23 is open so that during the operation ofsthe pump gasoline may be forced through the passage 26, pipe 25", to the carburetor 23, and from said carburetor through the pipe 24 to the vehicle motor.- 50

This would be e condition. of the valve mechanismwhen the uck is in movement over a road,

When, however, the truck or other vehicle is brought to a standstill and it is desired to fill an oil tank on said truck, or to perform some other to the vehicle motor without passing through the meter 2 I.

-When, on the other hand, the truck is at a standstill and it is necessary to perform some work using the power ofthe vehicle motor, the meter- 2l will be brought into operation and accurately measure all gasoline used while this work is being performed.

This meter will give an accurate reading of the exact amount of gasoline which is used when the vehicle motor is performing some work while the vehicle is at a standstill.

The various readings of the meter after various works have been accomplished by the vehicle motor are added togethen'verified and presented to the tax oflicials so that a'rebate may be obtained on the amount ofgasoline-used in these various operations, which gasoline thus used is non-taxable. 5

In heavy oil trucks, for instance, the amount of gasoline used in this manner amounts to consid-.

erable and the tax thereon is wellworth saving. This rebate, however, can not be obtained unless the amount of gasoline used in these operations is accurately metered and this may be accomplished readily by the mechanism illustrated in the drawings.

The modification shown in Fig. 2 of the draw-- ings operates in precisely the same manner with the exception that two valves 23, 29 are used with alined plungers 3t, 3t therein pivotally connected to the power take-01f lever N which is disposed between said valves 28, 29.

. ,As shown in Fig. 2, the passage 32 in the valve 29 is open permitting gasoline to be pumped there through to the carburetor 23 through the pipe 25 and from thecarburetorthrough the pipe 26, to the vehicle motor.

By moving the lever ill in the direction of the arrow b on Fig. 2 of the drawings, the passage 32 may be closed by the plunger 3! and the passage 33 will be opened permitting the gasoline to be pumped therethrough from pipe Ila: to the meter 2i through pipe 20 and from the meter 2| through pipe22 to.the carburetor 23 and from this car: buretor through the pipe 24 to the vehicle motor.

In the modification shown in Fig. '3 two valves 34, 35 are used. having plungers 3,6, 31 therein normally retained in raised position by means of the springs 38, 39. f

These plungers have passages 40,. 4| extending therethrough adapted to be alined with the passages, 4:;v m the' valve mespun??- The lever ill in this case is provided with laterally extending arms 44,45 which in the movement of the lever l0 about its pivot are adapted to coact with'the plunger-s36, 31 and press said plungers downwardly against the tension oi the springs 38, 39. Y

As shown in Fig. 3 of the drawings the arm 44 has depressed the plunger 36 so that the passage 40 is in alinement with the passage 42 and when in this position the gasoline from the pump l8, passes through the pipe l1 and the branch pipe llm, through the passages 42, 40, then through the pipe 25 and pipe 22a into the carburetor 23, and from said carburetor through the pipe 2% to the vehicle motor. r I

When the lever I0 is moved sufficiently in the direction of arrow 0 on Fig. 3, the arm 66 is adapted to depress the plunger 3! and bring the passages 4|, 43 in alinement and in so doing permit the gasoline to be pumped through the pipe 57, branch pipe l'lb, through the valve 35, pipe 28 to meter 2 l, and from said meter 2i through the pipes 22 and 22a. to the carburetor 2 3, and from the said carburetor through the pipe 23 to the vehicle motor.

. Having thus described my invention, I claim:

1. In a mechanism of the class described, a manually actuated power take-off lever adapted to cut oh the transmission of power from a vehicle motor to the driving mechanism of said vehicle, a meter, valve mechanism operable by the movement of said lever to permit the passage ofgaso- "line either directly to the vehicle motor or indirectly to said motor through said meter when the running gear of the vehicle is not in operation, a gasoline pump, and a pipe therefrom to said valve mechanism.

2. In a mechanism as 'set forth in claim 1, in which a carburetor is provided through which gasoline passes to the vehicle motor directly from the pump or indirectly from said meter.

3. In a mechanism of the class described, a manually actuated power take-ofi lever adapted when moved in one direction to cut off the'transmission of power from a vehicle motor to the driving mechanism of said vehicle, a. meter, a valve having an inlet and two outlets therefrom, a

' carburetor, a gasoline pump, a pipe leading from said pump to the inlet of said valve, a pipe leading from one of the valve outlets to said carburetor,

iiower take-oil ver normally closing the Outlet to the meter and vable by said power take-off lever into a posi tion to open the outlet to the meter and close e outlet to the carburetor. 

